Adjustable chair



March 27, 1934. E. M. KNABUSCH ET AL 1,952,376

. ADJUSTABLE CHAIR Filed Sept. 18, 1930 5 Sheets-Sheet l E. M. KNABUSCHEl AL 1,952,376

ADJUSTABLE CHAIR March 27, 1934.

5 Sheets-Sheet 2 Filed Sept. 18, 1930 March 27, 1934. E. N H ET A1,952,376

ADJUSTABLE CHAIR 5 Sheet-Sheet 5 Filed Sept. 18 1930 March 27, 1934.KNABUSCH r AL 1,952,376

ADJUSTABLE CHAIR Filed Sept. 18, 1950 5 Sheets-Sheet 4 am ,6 m @f/m 3517 March 27, 1934. v E. M. KNABUSCH ET AL 1,952,376

ADJUSTABLE CHAIR Filed Sept. 18, 1930- 5 Sheets-Sheet 5 Patented Mar.27, 1934 ADJUSTABLE CHAIR Edward M. Knabusch and Edwin J. Shoemaker,Monroe, Mich.

Application September 18, 1930, Serial No. 482,784

8 Claims. (Cl. 155-116) Our invention has for' its object to provide anefllcient adjustable chair. The chair may be used in connection with anyform of support,

that is, the invention may be embodied in an ,ordinary oflice or housechair or it may be embodied in a vehicle chair or seat. When used in avehicle the chair is preferably so constructed that it may be readilyadjusted in its position with reference to parts of the vehicle, such asthe steering wheel or post, or controlling mechanisms of an automobile,or with reference to other chairs located within the vehicle. Also, itis preferably so constructed that its back may be readily adjusted tothe reclining position that the user of the chair desires to take. Wherethe chair is used in a vehicle, such as an automobile or bus, or in arailroad or electric car, it is also preferably provided with a shockabsorbing means aside from the springs that form the cushioned parts ofthe chair which constitutes a part of the upholstering. Also, the chairT may be provided with a means for moving the back of the chair towardsthe front as the position of the back of the chair is reclined, whichoperates to eliminate, or reduce, the drag of the clothing on the backof the individual when he reclines.

The chair is also preferably so constructed that the reclining movementof the chair is brought about by pressure of the back of the individualagainst the back of the chair and the portion of the weight of theindividual, resting on the back, is substantially counterbalanced by theweight of the portion of the body of the individual that rests upon theseat.

' Also, the chair is so constructed that, if desired, the back may belocated substantially in the plane of the seat of th chair to form acouch of a length substantially equal to the length of the back and theseat. 01', if a second chair is located in line with the chair,embodying our in: vention, a full length couch will be formed of the twochairs. Also, the chair is so formed that the back may be folded ontothe seat and the two turned up edgewise to reduce the iioor spaceoccupied by the chair.- Thus the invention provides a chair that isparticularly adapted for use in connection with automobiles andomnibuses, inasmuch as the chair operates to absorb the shocks in thecourse of a trip and affords opportunity, by the changes in position ofthe chair, to rest the body of the passenger using the chair. I

The invention embodies other features and advantages which will appearfrom the following description and upon examination of the drawv ings.Structures containing the invention may partake of different forms andmay be varied in their details and still embody the invention. Toillustrate a practical application of the invention, we have selected avehicle chair embodying the invention, as an example of thevariouschairs and details thereof that contain the invention, and shalldescribe the selected structure hereinaften'it being understood thatvariations may be made and that certain features of our invention may beused to advantage without a corresponding use of other features andwithout departing from the spirit of the invention. The particularstructure selected is shown in the accompanying drawings.

Fig. 1 is a perspective view of the chair embodying our invention which.has been selected as illustrative of the different chairs that containour invention. Fig. 2 illustrates the chair folded and located in aposition to occupy the minirnum amount of floor space. Fig. 3illustrates the shock absorbing elements of the chair. Fig. 4illustrates the couch forming position of the chair. Fig. 5 illustratesa side view of the elements that provide for the support of the back inthe couch forming position illustrated in Fig. 4. Fig. 6 illustrates theelements that control the position of the seat and back, one relative tothe other, when the back is located in different positions with relationto the seat. The figure illustrates a view of a section taken on theplane of the line 6-6 indicated in Fig. 1 when the back is in oneposition. Fig. 7 illustrates the elements that control the relationbetween the back and the seat when the'back and the seat are in aposition different from that shown in Fig. 6. Fig. 8 illustrates anadjusting means to adjust the resistance to the movement of the backrelative to the seat by the pressure of the user of the chair againstthe back. Fig. 9 illustrates an enlarged view of the adjustable partsshown in Fig. 8 and when the adjustment is located in one extremeposition. Fig. 10 illustrates the said parts when the adjustment islocated in the other extreme position. Fig. 11 illustrates an edge viewof the elements illustrated in Figs. 9 and 10. Fig. 12 illustrates aview of a section of the elements of one side of the chair taken on-theplane of the line 1212 indicated in Fig. 6. Fig. 13 illustrates a viewsimilar to that shown in Fig. 12 taken on 5 the plane of the line 13-13indicated in Fig. 7.

Fig. 14 is a composite view of the disassembled parts that enablemovement of the back relative to the seat of the chair to'a couchforming position. Fig. 15 is an enlarged perspective broken view showingthe supporting frames of the chair and the interframe connecting parts.

In the particular form of construction shown in the figures, means isprovided for supporting the chair body in such a manner that endwisemovement, or forward and backward movement, is permitted relative to thefloor, or support, on which the chair is located, but, when suchmovement occurs, it will be yieldingly resisted and, hence, all endwise,or substantially horizontal, movement is absorbed by the yieldingresistance. Therefore, when there is any shock caused by the change ofthe movement of the vehicle, it will be absorbed by the yieldingresistance. To afford such yielding resistance, it is found preferableto cause the body of the chair to rise as it moves forward. In theparticular form of construction shown, the body of the chair issuspended on links which swing forward or rearward and upward,

.in either case, to absorb the shock of change of movement of thevehicle in which the chair is located.

Thus, in the form of construction shown, the chair 1 is supported on aprimary frame 2. The frame 2 may be located on a suitable floor or othersupport. Where the chair is used in a vehicle, it is preferablyadjustably and pivotally supported to enable adjustment of the chair,with reference to other'chairs and objects in the car, that isparticularly advantageous when the chair is used as the drivers seat ofan automobile and enables forward and tilting movements of the chairgiving more room at the rear of the chair and so locate. the chair thatit will occupy a smaller floor area. The frame 2 is formed U- shaped. Itextends from one side of the chair to the other side, the body of thechair being located within the legs 3 of the U. The legs of the U arealso provided with arms 4 that extend parallel to each other and alongopposite sides of the chair. The ends of the arms 4 are pivotallyconnected to the arms 5 which are secured to a bell crank lever or bentrod 6 that is supported for oscillatory movements in brackets 7 that aresecured to the floor 8. The part 9 of the U-shaped frame 2, thatinterconnects the legs 3, is located beneath the chair 1 and may restupon the floor 8. The forward end of the frame 2 is supported by thearms 5 and the rod 6. When the rod 6 is turned, the arms 5 swing andshift the frame 2 along the floor. The arms 5 are of a sufficient lengthand are so connected to the arms 4 that the chair may be swung on thepivot pins 10 that interconnect the arms 4 and 5 so that the frame 2 andthe bottom of the chair may be placed in upright positions,substantially as shown in Fig. 2.

Rotation of the rod 6, to adjust the position of the chair along thefloor, is produced by means of a screw 15 that is rotatably supported ina stirrup 16 which is connected to the bent rod 6 at the point where therod 6 is located remote from its axis of rotation in the brackets 7. Thescrew 15 extends through a nut, or threaded block 17, which is rotatablysupported in a bracket 18 that is also secured to the floor while thestirrup 16 is so connected to. the screw 15 that, while the screw 15-mayrotate in the stirrup, longitudinal movements of the stirrup along thescrew is prevented. Consequently, the screw 15, when rotated, operateson the bent rod 6 to swing the arms 5 and shift the frame 2 along thefloor and adjust the position of the chair.

The chair is supported on the frame 2 by means of the links 20. It isthus suspended for Oscillatory movements on the frame 2. The links 20,depending from the arms 4, are connected to the chair 1 at their lowerends. Consequently, the chair 1 is susceptible to swinging movements,parts being maintained at a substantially constant angle, with referenceto the floor 8, when subjected to any oscillatory movements. The links20 have a length sufiicient that, they wil operate to absorb the shockof a-change, in movement in the body of the vehicle. Vertical movementsof the body of the vehicle are, ordinarily, cared for and absorbed bythe springs of the vehicle and the springs of the upholstering orcushion of the chair, but the swinging movements of the body of thevehicle or any forward and backward movements, due to its springsuspension, produces an excessive tiring effect on passengers and is notabsorbed by any of the construction or part of the vehicle. The links 20permit forward and backward movements of the chair and cause returnmovements of the chair, relative to the floor, subsequent to eachforward and rearward movement of the vehicle, as indicated in Fig. 3.Such swinging movement of the chair is yieldingly resisted by the weightof the individual and, consequently, the shock of such forward andbackward movements of the vehicle is absorbed by the suspension of thechair 1 by the links 20. I

The lower ends of the links 20 are connected to thelower edges of theplates 23. The plates are connected together by a rod 21 and with theplates form a secoondary frame 22. The frame 2 may be referred to as aprimary frame and the frame 22 may be referred to as the secondaryframe. A pair of links 24 and 25 are connected to each plate 23 near itsupper edge by the rivets 27 and 28. The link 25 is an adjustable linkand is formed of two parts as hereinfater described.

The lower ends of the links 24 and 25 are con-' nected to the seat frame29 comprising a pair of curved bars 30, to which are connected a pair ofL-irons, or brackets, 31, on which the chair bottom board 32 is placedand to which the board is secured. A pair of bent rods 33 are secured tothe front and rear edge portions of the bottom board 32. The rods 33extend along the outside of the lower ends of the supporting links 20and afford a means for attaching the decorative upholstering materialalong its edges and at the sides of the chair to cover the supportingparts of the chair. The plates 23 and the links 24 and 25 form a meansof connection between the frame 2 and the mechanism that controls therelation between the back and the seat of the chair and the forward andbackward movements of the vehicle are absorbed by the swinging movementsof the links 20 and consequently such movements are not transmitted tothe chair body, that is to the seat and the back.

The back 36 is connected to the seat 1 by a means that will position theseat relative to the floor according to the position or angle in whichthe back is placed relative to the seat. In the ordinary use of thechair, the back and seat are manipulated by the pressure of the back ofthe user on the back of the chair. The connection is such that theposition of the back of the chair and the position of the seat aremaintained by the normal weight of the parts of the body of the userresting upon the back and the seat, respectively, of the chair and tochange this relation a pressure or weight of either part of the body, onthe corresponding part of the chair, will cause the change, themechanism having means whereby the resistance tochange in the relativepositions of the back and the seat of the chair may be adjustablyvaried, as may be desired. The inter-control mechanism, as between theback and the seat of the chair, has also a means for varying the forwardmovementof the back relative to the seat, whereby rearward movements ofthe back, relative to the seat, will prevent or reduce the drag on theclothing. The extent of the forward movement of the back, relative tothe seat, to prevent dragging of the clothing on the back of the user,also may be adjusted as may be desired and, preferably, according to thethickness of the upholstering of the back of the chair. Furthermore, theconnection of the back with the other parts of the chair is soconstructed that the back may be located substantially in the plane ofthe seat of the chair to convert the chair into substantially a couchform. Thus the control mechanism' for controlling the relation of theseat to the back is provided with a means for supporting the back in notonly any of the chair reclining positions but also in a couch formationand, when in any of the positions, the chair is oscillatably supportedto absorb road shocks or vehicle movements.

In the particular form of construction shown in the drawings, the back36 has a frame 37' that may consist of the strap border iron 38, towhich is connected a suitable back or upholstering supporting board 39.A pair of elements or arms 40 are connected to the lower ends of theopposite sides of the frame of the back. Each arm'40 terminates in ascroll shaped hook 41 having a scroll shaped slot 42 at its end and '2.lug or pin 43 that is located on a projecting finger 44 and below theend of the slot 42. The ends of the arms 40 are located between two setsof elements connected to a chair supporting frame and to the seat, orseat frame. One set comprises a pair of slotted levers 45 which arepivotally connected to the curved bars 30, and the other set are a pairof levers 46 that coact with other elements to locate the back and seatone relative to the other, as hereinafter described. Each lever 45 hasthe slot 47 that has a curved portion 48 that terminates in a recessthat forms a portion 49 of the slot 47. The portion 49 of the slot 47extends centrally with respect to the center of the curvature of theportion 48. The lever 46 is provided with a pin 50 on which a roller 51may be located. The pin 50 extends through the lever 45 and is riveted Iover the edge portions of the opening 52 formed in the link 45 intowhich the pin 50 extends. The upper end of the lever is also providedwith a curved edge portion 55 that terminates in a pair of notches orrecesses 56 and 57. The end of the arm 40 is provided with a pin 58 thatis located beside the inner end of the scroll shaped slot 42 and in thehook 59. When the arm 40, the lever 45, and the lever 46 are securedtogether by the pivot pin 50, the pin 43 is located in the slot 47 andthe pin 58 is located on the curved edge 55 of the lever 46 and normallyin either one or the other of the recesses 56 or 57. The pin 50 may belocated in the slot 42 and, consequently, the arm 40 may be swung aboutthe pin 50 as on a pivot, the pin 43 moving along the curved portion 48of the slot 47, and the pin 58, moving along the curved edge portion 55,.until the pin 58 rests in either recess 56 or 57. The outer edgeportions of the recesses 56 and 57 afford one means for limiting thepivotal frame operating to lift the seat frame.

movements of the arm 40 and, consequently, of the back of the chair inits swinging movements, relative to the seat of the chair. The inner endof the slot42 coacts with the pin 50 to alsov limit the movement of thearm 40 relative to the lever 46 and the pin 43 and the lower end of thecurved portion of the slot 47 also affords a limiting means to limit therearward movement of the back relative to the seat. If desired, a roller51 may be located on the pin 50 so as to be positioned in the slot 42 toreduce friction of movement of the parts relative to each other. Therecess 56 and the pin 58 and the upper end of the slot 47 and the pin 43provide a means for limiting the forward or folding movement of the backtowards the seat.

When it is desired to locate the back substantially in the plane of theseat, in couch formation, the back is moved relative to the seat so thateach pin 43 will be positioned in the lower end of the curved portion 48of the slot 47. The back may then be raised, the pin 43 moving along thepart of the centrally extending portion 49 of the slot 47, while theedge of the slot 42 moves along the pin 50 and until the pin 50 .islocated on the outside of the slot 42 and hook 59. The back is thenallowed to drop while the pin 58 enters the recess 57 and the pin 43moves along the centrally extended portion 49 of the'slot 47 to the endof the said portion, or recess. The pin 43 may move about the pin 58, asa central pivot pin, when it is thus located in the recess 57. The backwill thus be held in its position in substantially the planeof the seatby the inter-engagement of the pin 58 in the recess 57 and theengagement of the pin 43 in the inner or more central end of the portion49 of the slot 47, as is shown in Fig. 4. The back may be returned bythe reverse movements of the parts.

The movements of the seat and the back, from the upright position of theback toward the reclined position of the back, are intercontrolled bythe connection of the levers 45 and the levers 46 with the parts of thechair. The rearward movements of the back tend to raise the seatrelative to the frame 2, the links 20 and the side plates.

The levers 45 are interlocked with the arms 40 by reason of theinterlocking of the pins 43, in the lower ends of the curved portions 48of the slots 47, and of the pins 50 that extend through the levers 46,the slots 42 and the openings 52. Each arm 40 and lever 45, underthese'conditions, form a lever that pivots about the pin 50 to raise theseat relative to the supporting frame 2. The pivot pin, namely the pivotpin 50, is movable by the controlling mechanism towards the seat and,consequently, as the seat is raised when the back is tilted rearwardly,the back is drawn towards the seat. This prevents dragging of theclothing on the back of the user of the chair when the back is forcedrearward in proportion to the forward movement of the pivot pin 50. Thelower end of each lever 45 is connected to the end of the curved bar 30that forms a part of the frame of the seat and, as described above, theframe of the seat is supported by the links 24 and 25. The links dependfromthe upper edge portion of the plate 23. Movement of the back fromthe upright position to the reclining position operates to swing theseat on the links 24 and 25 to raise the seat and move it forward, thelevers 45 and the back The levers 46 are fulcrumed in the ends of theshort links 60 which, in the same movement follow up the seat frame byreason of the upward movement of the links 45 and the links 60, swingupwardly and provide movable fulcrums for the levers 46. Each lever 46is connected to the link 25 by means of the link 62 which draws thelever 46 forward as the seat frame is raised. The extent of the forwardmovement depends upon the points of connection of the link 62 relativeto the pivot point of connection of the link 25 with the plate 23 andthe point of connection of the link 62 with the lever 46 relative to thepoint of connection of the lever 46 with the link 60.

The link 62 is adjustably connected to the link 25 for varying not onlythe extent of forward movement of the back, relative to the seat, butalso to vary the resistance of the adjustment of the back relative tothe seat. I If the lever 46 were stationary, there would be a freeforward and upward movement of the seat when the back was pressedrearward by the lifting operation of the combined action of the arm 40and the lever 45, but, inasmuch as the swinging movement of the link 25draws forward the back, the pressure required to adjust the back,relative to the seat. is increased, that is, the rearward movement ofthe back is reduced by the amount that the pivot pin 50 is drawn forwardto produce the necessary lift against the pressure of the part of thetrunk of the body of the individual in the chair. When there is arearward rotation of the back rest about the pins 50 produced by acertain pressure on the back rest, the continued rotation of the backrest is resisted by an increasing pressure on the lever 45 due to aforce exerted thereon by a certain pressure on the seat member, as it iscaused to move out of equilibrium with respect to its suspension links,and the resisting pressure continues to increase as the seat is thrownfarther out of equilibrium until the moment of this force about the pins50 equals the moment about the pins 50 of the force exerted against thebackrest member. Therefore, the pressures upon the back rest and theseat will at all times tend to counterbalance each other, no matter whatthe positions of these two members may be relative to each other.Furthermore, inasmuch as the back rest is connected to the seat so as tocause the seat to swing on the links 24 and 25, the weight on the seatis then more advantageously disposed to resist further forward movementof the seat and, consequently, to resist a further rearward swingingmovement of the back rest. It is this combination that provides for thecounterbalancing of the pressures exerted on the back and on the seat bythe distribution of the weight of the occupant. When the occupant movesto a more erect position, there is then, a greater pressure exerted onthe seat and a lesser pressure on the back rest, but the links then moveto new positions wherein they sustain this --new difference in pressuresand consequently the parts of the chair body, namely, the seat and theback. The seat and the back rest retain their relative positions in acounterbalancing relation and support the occupant without furthermovement relative to each other, unless a slight additional pressure isapplied to the seat by a forward movement of the upper part of the bodyof the occupant, or unless a slight increase in pressure is exertedagainst the back rest, either of which changes in pressures will act toreposition the parts of the chair and again bring about a substantiallybalanced condition of the two parts. A corresponding return of the backis produced when the individual sits upright in the chair, while theback remains reclined or when there is a movement to release thepressure, due to the weight of the part of the body of the user of thechair on the back. This eliminates the use of springs that are sometimesused for yieldingly resisting adjustment of the backs of chairs relativeto the seats and for returning of the backs to upright positions whenthey are released. The weight of the back thus counterbalances, in allpositions, the seat of the chair by reason of the change in the momentof the weight on the back and the displacement of the seat that issupported by the swinging links 24 and 25.

Adjustment of the point of connection of the link 62 with the adjustablelink 25 is obtained by shifting the point of connection of the link 62to link 25. The adjustable link 25 is formed of two parts 68 and 69. Thepart 69 is pivotally connected at its upper end by the pivot pin 28 tothe plate 23. The lower end of the part 68 is connected to the end ofthe curved bar 30 by means of an adjustable cam 70 which is eccentriclyconnected to a bolt '71 that extends through the end of the curved bar30 and the end of the part 69 of the link 25. The upper end of the part68 ofthe link 25 is provided with a pin '72 that is movable in a slot'73 formed in the part 69 of the link to allow for the adjustment of thepart 68 of the link, relative to the part 69, by rotation of the bolt'71. The link 68 is secured in its adjusted position by the nut 74 whichprevents rotation of the bolt. The link 62 is connected to the pin '72and movement of the pin '72, along the link 25, changes the extent ofthe arcuate movement of the pin 72 and, consequently, the extent of thearcuate movement of the lever 46 to which the link.25 is connected bythe link 62. This operates to vary the forward movement of 'the backrelative to the upward movement of the seat. These two movements of theseat and the back operate to draw the parts towards each other andreduce the dragging of the clothing forward on the back of the user ofthe chair and vary the pressure on the back required to adjust theposition of the back relative to the seat. Thelowering of the pin '72 tomove it away from the pivot point 28 decreases the drag of the clothingand increases the resistance to the pressure that is required to movethe back rearward and reduces the resistance to the restoration of theback and the seat, that is, to an upright position.

Suitable fibre sheets may be located between the metal parts to preventrattle in the manner well known in the art.

Thus, by our invention, we have produced an exceedingly efficient chairthat has many features and advantages for use, particularly inconnection with vehicles, in that it provides for absorbing the majorpart of the shocks, and also wherein the chair may be folded andconveniently handled or used while still secured to the floor, or otherrelatively stationary member, and also one wherein an counterbalancingsprings are eliminated, and wherein the objectionable drag on theclothing is avoided when the chair is moved into a reclining position;and also wherein the back may be located in a horizontal position insubstantially the plane of the seat to form a couch. These features andadvantage being accomplished by elements that co-ordinate to produce theresults as described in each case and wherein the connections arecomparatively simple and formed of parts that may be made cheaply,results in an exceedingly eflicient chair structure that may be made ata low cost of production.

We claim:

1. In a chair, a seat member and a back member, a frame, the seat membersupported on the frame, a pair'of levers connected to the frame, apair'of arms connected to the back member and having means forinterlocking the arms with the said levers to cause the arms and leversto move together and including a pair of pins, the arms and the leverspivotally supported on the pins, a second pair of levers, pins pivotallyconnecting the said second pair of levers to the first named levers, asecond frame comprising a pair of side members, links interconnectingthe frames for supporting the first named frame and the seat member onthe second named frame and links connecting the second pair of leverswith the first named frame, the arms and the first named levers.operating to produce forward and upward movements of the seat memberrelative to the said second frame when the back member, the arms, andthe first named pair of levers are moved about the said pivot pins.

2. .In a chair, a seat member and a back member, a frame, the seatmember supported on the frame, a pair of levers connected to the frame,a pair of arms connected to the back member, the levers and the armshaving means for interconnecting the said arms and levers for limitedpivotal movements of the arms relative to the levers and to cause thearms and levers to move as a unit when the arms reach the limit ofmovement relative to the levers and including a pair of pins, the armsand the levers pivotally supported on the frames, a second frame, linksinterconnecting the ,zframes for supporting the first named frame andthe seat member on the second named frame, back supporting membersconnected to the second named frame, the said pins extending through theback supporting members and the arms and the levers for pivotallysupporting the said back, arms, and the said levers, the arms and thelevers operating to produce forward and upward movements of the seatmember relative to the second named frame when the back, the arms, andthe levers are moved about the said pivot pins, the said arms and thesaid back member adapted to fold relative to the said levers and thesaid seat member by movement about the said pins.

3. In a chair, a seat member and a back member, a frame, the seat membersupported on the frame, a pair of levers pivotally connected to theframe, a pair of arms connected to the back member, a second frame, asecond pair of levers connected to the second frame, apin extendingthrough one of each of the said second pair of levers for pivotallysupporting the said arms and the said first named levers on the secondpair of levers, links interconnecting the said frames for producingforward and upward movements of the seat member relative to the secondnamed frame when the said back member, the said arms,

a and the said first named levers are moved about the said pair of pins,links interconnecting each of the second named levers with one of thefirst named links to move the said second named levers and the pivotpins forward a short distance when the seat member is moved forward.

4. In a chair, a seat member and a back member, a frame, the seat membersupported on the frame, a pair of levers connected to the frame,

a pair of arms connected to the back member, a second frame, a secondpair of levers connected to the second frame, a pair of pins extendingthrough the first named levers, the arms, and the second named leversfor pivotally supporting the said arms, the first named levers, and theback member on the second pair of levers, the first named levers and thearms having slots and pins to produce limited rearward movements of thearms and back relativeto the first named levers and the seat to producepositve movement of the levers with the arms when the arms are movedrearwardly beyond the limited-distance and enable folding movements ofthe arms and back towards the levers and the seat when the back memberand arms are moved towards the seat member.

5. In a chair, a seat member and a back member, a frame, the seat membersupported on the frame, levers connected to the frame, arms connected tothe back member, a second frame, a pair of pivot supporting memberssupported on the said second frame, a pair of pins extending through thepivot supporting members, the arms, and the levers for pivotallysupporting the arms and the levers on the pivot supporting members, thearms and the levers having slots andengaging pins, two of the engagingpins of the arms extending into the slots of the levers, the pivot pinsextending through the slots of the arms and through the levers, thepivot supporting members having notches for engaging two of the engagingpins of the arms for supporting the arms in a position to locate thesurface of the back substantially in the plane with the surface of theseat to form a couch of the seat and the back.

6. In a chair, a seat member and aback member, a frame, means forsupporting the seat member on the frame, a pair of levers connected tothe frame, a pair of arms connected to the back member, a second frame,a pair of pivot supporting members supported on the. second frame, pivotpins extending through thepivot supporting members for pivotallysupporting the arms and the levers, the arms having engaging pins, thesaid supporting members having means for engaging the pins to locate theback substantially in the plane of the seat to form a couch of the seatand the back, the arms and the levers having slots and pins to enableforward movements of the arms relative to the levers for folding theback against the seat and limited relative rearward movements.

7. In a chair, a seat member and a back member, a frame, means forsupporting the seat member on the frame, a pair of levers connected tothe frame, a pair of arms connected to the back member, a second frameconnected by links to the first frame, a pair of pivot supportingmembers supported on the second frame, pivot pins extending through thepivot supporting members, the arms, and the levers for pivotallysupporting the arms and the levers, the arms having engaging pins, thesaid supporting members having means for engaging the engaging pins tolocate the back substantially in the plane of the seat to form a couchof the seat and the back, the arms and the levers having slots and pinsto enable forward movements of the arms relative to the levers forfolding the back against the seat, a third frame, links interconnectingthe said third frame and the second named frame for supporting thesecond named frame and means for pivotally supporting the said thirdframe for rotating the seat and the back to upright positions when theback is folded against the seat.

8. In a chair, a primary frame, a pair of plates and a connectingmember, a plurality of links connecting the primary frame and the pairof of levers connected to the seat member, a second pair of leversconnected to the aforementioned pair of plates by a third pair of linksand adjustably connected to the front pair of seat member suspensionlinks by a fourth pair of links, a pair of pins pivotally connectingeach of the first mentioned pair of levers to 'one of the second pair oflevers and adapted to be slidably received within the slot in one of thesaid pair of bifurcated arms, a second pair of pins, each of the saidsecond pair of pins secured to the straight finger on one of theaforementioned pair of bifurcated arms and slidable along the slot inone of the first mentioned levers, the second mentioned pair of levershaving cams and recesses located at ends of the cams, a third pair ofpins, each of the said third pair of pins secured to a curved finger andmovable over a cam and engaged by one or another of the recesses.

EDWARD M. KNABUSCH, EDWIN J. SHOE .1 as:

